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<head>
  <title>Test for bug 1346623</title>
  <script type="application/javascript" src="chrome://mochikit/content/tests/SimpleTest/SimpleTest.js"></script>
  <script type="application/javascript" src="chrome://mochikit/content/tests/SimpleTest/EventUtils.js"></script>
  <link rel="stylesheet" type="text/css" href="chrome://mochikit/content/tests/SimpleTest/test.css"/>
</head>
<body onload="startTest();">
<a target="_blank" href="https://bugzilla.mozilla.org/show_bug.cgi?id=1346623">Mozilla Bug 1346623</a>
<div id="display">

</div>
<pre id="test">
<script type="application/javascript">

var Ci = Components.interfaces;
var winUtils = window.QueryInterface(Ci.nsIInterfaceRequestor).getInterface(Ci.nsIDOMWindowUtils);

function startTest() {
  // load some styles at the agent level
  var css = `
    #ac-parent { color: green; }
    #ac-child.abc { }
  `;
  var sheetURL = "data:text/css," + encodeURIComponent(css);
  winUtils.loadSheetUsingURIString(sheetURL, winUtils.AGENT_SHEET);

  // add canvas anonymous content
  var bq = document.createElement("blockquote");
  bq.id = "ac-parent";
  bq.textContent = "This blockquote text should be green.";
  var div = document.createElement("div");
  div.id = "ac-child";
  div.textContent = " This div text should be green.";
  bq.appendChild(div);
  var ac = document.insertAnonymousContent(bq);
  document.body.offsetWidth;

  is(ac.getComputedStylePropertyValue("ac-child", "color"), "rgb(0, 128, 0)",
     "color before reframing");

  // reframe the root
  document.documentElement.style.display = "flex";
  document.body.offsetWidth;

  // restyle the div
  ac.setAttributeForElement("ac-child", "class", "abc");
  document.body.offsetWidth;

  is(ac.getComputedStylePropertyValue("ac-child", "color"), "rgb(0, 128, 0)",
     "color after reframing");
  SimpleTest.finish();
}

SimpleTest.waitForExplicitFinish();
</script>
</pre>
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